Rope-guide for winding-drums.



Patented Dec. 29, 1908, Z

S. H. LIBBY. ROPE GUIDE FOR WINDING DRUM APPLIOATION FILED Jun 24, 1909.

|NVENTDRZ ,jAm Humaniii? W1 WiTNEfiEI 1::1:

SAM H. LIBBY, OF EAST ORANGE, NEW JERSEY, ASSIGNOR A CORPORATION OF NEW JERSEY.

in hoists 'su ts are liable to occur ting the rope,

UNITED sTAgns PATENT oru rcn.

TO SPRAGUE ELECTRIC COMPANY.

a ROPE-GUIDE FOR WINDING-DRUMS.

Specification of Letters Patent.

Patented Dec. 29, 1908.

Application filed June 24, 1908.- Serial No. 440,131.

To all whom it may concern: 1

Be it known that I, SAM H. LIBBY, acitizen of the United States, residing at East Orange, county of Essex State of New Jersey, have invented certain newand useful Improvements in Rope-Guides for Winding- Drums, of which the following is a specilica tion. 7

My invention relates to guides for winding drums, and is particularly adapted for use in connection with spirally grooved drums used and similar formsof apparatus.

In hoists in which a cable is taken up and paid out by the rotation of a spirally grooved drum, it may occur that the rope will not follow the groove if the weight which the hoist is lifting is not directly below that part of the groove in which the last turn of the rope rests. If under this or any other condition the rope rides over the walls of the grooves and does not follow the latter, disastrous reby bruising or cutor by allowing the rope to ride off the end of the drum;

It'is an object of my invention to provide a simple formof guide which will positively insure the rope following the groove in the drum at all times and under all conditions.

To the above end, I have provided for use in connection with spirally grooved winding drums, a rope guide which is moved in 006 ters.

- upon which is .rope guide applied thereto;

of the guide with the spiral groove in the drum.

In the drawing I have illustrated a simple form of my invention.

. Figure 1 is an end elevation of a hoist hava spirally grooved winding-drum with my Fig. 2 is a plan view of the drum and guide shown in Fig. 1 and Fig 3 is a view in perspective of the rope guidedandthe part by which it may be suporte p Like parts are referred to throughout the several views y the same reference-charac- A portion of the casing of a hoist is shown in outline at 5, from which projects a shaf t 6 mounted a spirally grooved drum 7. A rope 9 is shown wound upon a ortion of the drum 7 ;.The rope 9, where it eaves the drum, passes down through a slot in a rope guide 10, theform of which is best and forth across the face of the drum suitable manner to the frame of the hoist, as I by means of an angle iron 12 secured to the angle iron 11 and attached to the frame of the hoist by the bolts 13. The face of the guide 10 is curved to conform to the drum 7 and projecting from this face is a lug 14 adapted to fit the groove in the drum 7.

'l he drum, rope and rope guide are so assembled that the lug 14 on the guide projects into the groove in the drum 7 one thread in advance of the last turn of rope. With this arrangement the guide is moved back arallel to the axis thereof and will ell'ectii ely prevent the rope from winding up on the drum otherwise than in the groove. Wings 15 and 16, extending from the bottom of the guide 10, as shown in Figs. 1 and 3, serve to take any side pull which may be exerted by the rope when the load is not directly beneath that portion of the groove in which the last turn of rope then lies.

Ill hile I have shown but one form in which my invention may be embodied, I do not wish to be understood as limiting it thereto since, as will be obvious to those skilled in this art, it may be embodied in many forms without departing from the spirit of the invention, as dc'lined in the following claims.

It hat I claim as new and desire to secure by Letters Patent of the United States, is,--

1. In con'ibinatidn, a spirally grooved drum adapted to receive a rope, and a re e guide arranged to be moved parallel to tlie axis of said drum by engagement with the spiral groove in said drum.

2. In combination, a spirally grooved drum adapted to receive a rope, and a rope guide cooperating with said drum and arranged to engage the groove in said drum and to be moved thereby.

3. In combination, a spirally grooved drum adapted to receive a rope, a rope guide coperating with said drum, means for support-mg said rope guide in its movement parallel to the axis of said drum, and a lug on said rope gride )rojecting into the groove in the drum v. here y said guide is moved.

l.v In combination, a spirally grooved drum adapted to receive a rope, a rope guide eoiiperating therewith, a supp01:t. ;for ,said In Witness whereof, I have hereunto set repedguigie elflowifllgdmovemelt tlhereof 1011; my hand this 19th day of June, 1908. gltu may 0 sai r um, an a ug on sai I rope guide rejecting into the groove in said SAM LIBBYL 5 drum in a Vance of the rope whereby the Witnesses: I

rope guide is caused to traverse the face of ROGER BUTTERWORTH, seld drum. ANNA M. GILLIN. 

